Subtraction 2 RT Dose with Simple filters module

Support
1

Slicer version:4.8.1
Hi 3D Slicer experts and all
I have 2 RT Dose whit different Image Dimension and Image origin, which were exported from TPS. I want to subtract them with Subtract image filter in simple filters module. but the following error is displayed. How can I subtract this RT Doses?
Thanks a lot

subtract

2

You could use the DoseAccumulation module (from the SlicerRT extension) and set the weight of the subtracted image to -1.